Depth gauge



FIG. 1 is a top and front perspective view of the depth gauge;

FIG. 2 is a bottom and rear perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a right side view thereof showing the side opposite that shown in FIG. 3;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed lines of the figures are for illustrative purposes only and form no part of the claimed depth gauge design. 

I claim the ornamental design for the depth gauge, as shown and described. 